Parameter redundancy in Jolly‐Seber tag loss models

Capture–recapture experiments are conducted to estimate population parameters such as size, survival rates, and capture rates. Typically, individuals captured given unique tags, then recaptured over several time periods with the assumption that these tags not lost. However, for some populations, tag loss cannot be assumed negligible. The Jolly-Seber model is used when no-tag-loss invalid. Further, has been extended incorporate group heterogeneity, which allows vary by membership. Many mark–recapture models become overparameterized resulting in inability independently parameters. This known parameter redundancy. We investigate redundancy using symbolic methods. Because of complex structure models, methods always applied directly. Instead, we develop a simple combination can models. incorporation heterogeneity into does result further redundancies. Furthermore, hybrid studied caused data through case studies generated histories different values. Smaller rates found cause These problems resolve large populations.